Umbrella



FIG. 1 is a perspective view of an umbrella;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing of a plurality of ornaments in FIGS. 1-6 is included for the purpose of showing environmental portions of the umbrella and forms no part of the claimed design. 

CLAIM The ornamental design for an umbrella, as shown and described. 